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27 December, 23:10

How many energy sublevels are in the second principal energy level?

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  1. 27 December, 23:29
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    There are two energy sublevels in the second principal energy level. These two energy sublevels are 2s and 2p. The energy distribution in an atom is divided into a number of principal energy levels, and the principal energy levels are again divided into four basic energy sublevels.
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